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Atomic Vernier Cam Gears adjustment problems 

 

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 Post subject: Atomic Vernier Cam Gears adjustment problems
Posted: Sat Jul 05, 2014 9:43 pm 
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hey everyone, over the past year i have been building a high comp na xr6 BF MKII and purchased vernier cam gears. when i sent it in to the tuners they had no clue how to set up the cam gears, even when i called atomic they had no information on how to set up their own product.

Would anyone please have any idea on how to get the most out of the adjustable cam gears or if they know of anyone who has set them up and give me the details ?

thank you
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 12:34 pm 
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you will need the cam specs and set up the cam timing accordingly
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 12:44 pm 
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The cams are atomic stage 4+, the problem is no tuner wants to adjust them accordingly as none know how to or dont bother with them as they are time consuming. im hoping that someone has done a close set up and would have information on what they set them on.
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 12:48 pm 
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do you have a sheet with ALL the cam specs?
most tuners will only know how to play with laptops and not cam gears - find a competent tuner that also knows how to build engines
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 12:52 pm 
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yer all details were provided.
yer im finding that out the hard way, i might stick with this tuner see what kinda power figures i get with him if im not happy ill go somewhere else. thanks for the help :)
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 12:53 pm 
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post or pm the specs and i can help give you settings to set them up
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 12:59 pm 
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Stage 4 Plus Cams #306553 Duo Phased

Advertised Inlet duration 287°
Advertised Exhaust duration 283°
Inlet duration at .050” lift 228°
Exhaust duration at .050” lift 223°
Lobe lift - inlet and exhaust .249”
Valve lift - inlet and exhaust .508”
Lobe centres Suggest 112° - 114°

these are the specs of the cam shafts from atomic's website also dont know if this is any help but this is the list of what has been done to the car post1421618.html#p1421618

thanks mate appreciate the help :)
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 3:21 pm 
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did they give you any other specs with the cams?
ie suggested ICL or lift @ TDC?

do you know how much piston to valve clearance you have from when you built the motor?
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 3:36 pm 
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the TDC is estimate 50 thou.
and i know the car has around 11.2 compression running E85
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 6:24 pm 
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In that case you would need to set your intake at around 10 thou at tdc then measure the icl and set the exh cam centreline 112-114 from there
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 7:03 pm 
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You mean 10 degrees ?
And the max the cam adjusts is 30 degrees explain what you mean when you say "112-114 from there" ?

Thanks Mate
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 7:05 pm 
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10 thou lift @ TDC and then measure the ICL with a dial gauge. Once you have found the ICL then set the exhuast centreline from there
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 Post subject: Re: Atomic Vernier Cam Gears adjustment problems
Posted: Sun Jul 06, 2014 7:10 pm 
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Alright thanks mate appreciate all the effort i shall give the info to the machanic :)
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